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(No Model.)

S. W. BABBITT.

MAGHINBFOR BMBUSSING WURKS IN SHEET METAL. No. 454,149. Patented June16,1891.

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SETH XVM. BABBITT, OEMERIDEN, CONNECTICUT, ASSIGNOR TO THE VILCOX SILVERPLATE COMPANY, OF SAME PLACE.

MACHINE FOR EMBOSSING WORKS IN SHEET METAL.

SPECIFICATION forming part of Letters Patent No. 454,149, dated J une16, 1891.

Application tiled July 9, 1888. Serial No. 279,401. (Nvo model.)

To all whom t may concern:

Be it known that I, SETH WILLIAM BABBIT'I, of Meriden, in the county ofNew Haven and State of Connecticut, have invented new and usefulImprovements in Machines for Embossing forks in Sheet Metal; and I dohereby declare the following to be a full, clear, and exact descriptionof said invention, reference being had to the accompanying draW- ings,and to the letters or gures of reference' marked thereon, which vform apart of this specification.

My invention relates to machinery for embossing articles made of sheetmetal-such as cups, coffee-pots, urns, and all the various articlesusually made of white sheet metal and silver-plated; and to this end myinvention consists in the construction and combination of partshereinafter described and claimed.

I-Ieretofore in the art of ornamenting or embossing from the inside orunder surface of sheet-metal ware it has been customary to employ whatis commonly known as a snarling-iron. This iron or tool consists of atempered bar bent at a right angle at one end to enter and be clamped bythe jaws of a vise, whileits other or outer end is bent upward andfashioned into a point, blunt or sharp, as desired. In use the iron isclamped in a vise, the article to be embossed is held over the outer endof the iron, and the main or horizontal portion of the iron is struck bya mallet or hammer repeatedly. The blows of the iron against thesheet-metal surface are more or less rapid, according to the length andtemper of theiron, and of course decrease in force after each stroke ofthe operators mallet until the next stroke. It will thus be seen thatthere is a constant variation in the force of the blows of thesnarlin-g-iron, due not only to the decrease above mentioned, but alsoto thevariation in the force used by the operator or his assistant instriking' the iron with the mallet. This variation, besides rendering italmost impossible to produce an even raised surface, has the eect oflifting or embossing a greater portion of the metal than desiredthat is,it spreads the line or portion to be raised. It is then customary totill the depressions on the under surface with a backing, and thendepress from the outside or upper surface those portions which have beenunduly raised.

It is therefore the object of my invention to produce a machine thatwill enable an operator to produce an even and finished embossed designupon all such ware as has heretofore required the use of thesnarling-iron and to do such work quickly and economically. I attainthese objects by the mechanism illustrated in the accompanying'drawings, in which- Figure l is a perspective View of the machine, andFig. 2 is a sectional detail view.

To a suitable base A is secured a bracket B, having bearings for thefulcrum-pin b of the lever C. Underneath the rear end of the lever C isplaced a block rubber spring or cushion A', and the forward end of thelever is provided with a hole to receive the shank d ot' theembossing-tool D, said shank being screw-threaded to receive a nut dbelow the lever for securing said tool in its place. Other means forsecuring this tool in position may be used, or the tool may be simplythe upturned end of the lever.

As shown in the drawings, I may use. tools of varying degrees ofsharpness, and, in fact, propose to do so in producing embossed lines ofgreater or less width.

In the base A in the rear of the bracket B is a threaded hole to receivea .set-screw 1, the head of which may serve as a stopto limit thedownward movement of the rear end of the lever. Another set-screw 2passes through the top of bracket B, and may be turned to bear upon thelever C, in front of fulcrum b, to limit the movement of the lever. Theset-screws l and 2 regulate the force of the blowof the embossing-tool,as they allow more or less vibration.

Projecting upward from the hase A is a standard E, which supports in anysuitable manner the motor F. As shown in the drawings, this motor,preferably a pneumatic tool, is held in bearings formed. in lateralprojections e cpfrom standard E.

At j and f are shown, respectively, a pipe and cock for supplying andregulating the amount of air for operating the pneumatic tool.

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The hammer G, which is given rapid vert1cal reciprocating motion by themotor, is arranged above the rear end of the lever and in closeproximity thereto, so that the downward motion of said hammer willdepress the rear end of the lever, while the spring A will return thelever to its former position upon the rise of the ham mer. In otherwords, the lever 1s kept in engagement with the hammer continuously bythe spring, so as to cause the tool D to strike the work to be embossed,which is held over it by the operator with the same number of blows perminute as the hammer is given by the motor.

In place of a pneumatic tool I may use a steam-engine, an electricmotor, or the hammer may be operated by a crank-rod from a system ofmultiplying gearing. In fact any .motor that will give a rapid strokemay be used.

The lever, as shown, is pivoted at or near its center. It may be pivotednearer either end, or it may be pivoted at one end, thus becoming alever of the third class instead of the iirst. In either case a springshould be used to keep the lever in contact with the hammer.

The hammer or plunger may be directly connected with the lever, so as tooperate the lever positively in both directions; but.- since theexceeding high rate of speed would tend to wear out the connection, Iprefer the construction as illustrated.

Instead of using a rubber spring to return the lever to its positionafter each stroke of the hammer, I may use any other kind of spring. Thepivoted lever, together with the means described for making it followthe movements of the motor, constitutes what may be called a pivotedsnarlerg and at that portion of the lever which receives the blows ofthe hammer I may place a removable piece of steel or other hardsubstance to take up the Wel.

The operation ot my machine is as follows: The motor being started, asin the case of a pneumatic tool, by turning the coekf to ad,-

mit the air, the leverwill be rapidly vibrated and the operator holdsthe article to be embossed over the embossing-tool l), a pattern beinggenerally first marked upon the Lipper or outer surface of the metal..The operator then presses the article downward, and, as the blows of thetool raise the material at the point ot' Contact, moves the articlealong and around, following the pattern desired.

Having now described myiuvention, what I claim, and desire to secure byLetters Patent, 1s-

l. A pneumatic tool or other equivalent motor held in a grip or frame,in combination with a pivoted snarler for produein g repousse work onmetals, as set forth.

2. In a machine for embossing works in sheet metal, the combination of apivoted snarler having an embossingtool projecting upward from one end,with a motor for vibrating said snarler, substantially as described.

In a machine for embossing works in sheet metal, the combination ot' apivoted snarler having a removable embossing-tool projecting upward fromone end, with a motor for vibrating said snarler, substantially asdescribed.

4. In a machine for embossing works in sheet metal, the combination of alever pivoted between. its ends to a base and having an. embossing-toolat one end, with a motor having a hammer to strike the other end ot' thelever, and a spring arranged to keep the hammer and lever in contactwith each other, substantially as described.

5. In a machine for embossing sheet-metal ware, the combinationv ol' thelever C, having an embossing-tool at one end, with a motor having hammerG, spring A,and a set-screw for limiting the vibration of -said lever,substantially as described.

In testimony whereof I aiiix my signature in presence of two subscribingwitnesses.

S. IVM. BABBITT.

Witnesses:

HENRY B. BEACH, J. M. REYNOLDS.

